Corrosion-resistant coating composition containing hollow microballoons
AssigneeT. C. Manufacturing Company, Inc.
InventorsJohn Blitstein, Donald Kathrein
Life of this patent
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Abstract
A fluoroelastomer-hollow glass microsphere coating has been found to provide new and unexpected corrosion resistance to metal surfaces for protection against severely corrosive environments. The coating comprises a fluorocarbon elastomer and 3-50% by volume of hollow glass microspheres or microballoons having a size in the range of about 2-300 microns, preferably 20-200 microns. The hollow glass microspheres or microballoons substantially increases the corrosion resistance of a fluoroelastomeric liquid composition, yielding new and unexpected thermal and chemical resistance, particularly when the coating composition is applied in two or more layers.
Claims7
A method of protecting a substrate from degradation caused by chemical or thermal attack comprising:
- coating said substrate with a layer of a fluoroelastomer composition comprising a fluoroelastomer dissolved in a solvent and a plurality of hollow microspheres dispersed in said dissolved fluorelastomer, said microspheres having a particle size in the range of about 2 to about 300 microns, said microspheres encapsulated in said fluoroelastomer composition in an amount of about 3 to about 50 percent by volume of fluoroelastomer plus microspheres;
- drying said layer of fluoroelastomer composition to form a first coating layer;
- and
- curing said first layer of fluoroelastomer composition.
Dependencies are inferred from the claim text.